Chapter 3 Exam

Aishi is 20 years older than their sibling. The sum of their ages is 60. How old is Aishi and their sibling?

• The sibling is 20 years old and Aishi is 40 years old.

• The sibling is 40 years old and Aishi is 20 years old.

• The sibling is 30 years old and Aishi is 30 years old.

• The sibling is 10 years old and Aishi is 50 years old.

Answer explanation

Aishi is 20 years older than their sibling. If the sibling is 20 years old, Aishi would be 40 years old, which adds up to 60. Therefore, the correct choice is 'The sibling is 20 years old and Aishi is 40 years old.'

Tags

CCSS.8.EE.C.8C

If you invest $1000 at an interest rate of 5% per year, how much money will you have after 3 years?

• $1100

• $1157.63

• $1050

• $1000

Answer explanation

If you invest $1000 at an interest rate of 5% per year for 3 years, you will have $1157.63. This is the correct choice as it reflects the compounded interest over time.

Tags

CCSS.HSF.BF.A.2

A car travels at a speed of 60 miles per hour. How far will it travel in 2.5 hours?

• 200 miles

• 150 miles

• 100 miles

• 30 miles

Answer explanation

The car travels at a speed of 60 miles per hour for 2.5 hours. Therefore, it will travel a distance of 150 miles, which is the correct choice.

Tags

CCSS.6.NS.B.3

A painter can paint a room in 6 hours. How long will it take for two painters to paint the same room?

• 12

• 2

• 3

• 4

Answer explanation

Two painters can paint the room in half the time, so it will take 3 hours.

Tags

CCSS.HSA.CED.A.1

If the sum of two numbers is greater than 10, and one of the numbers is 4, what is the range of possible values for the other number?

• Less than 6

• Equal to 6

• Greater than or equal to 10

• Greater than 6

Answer explanation

The other number must be greater than 6 because the sum of two numbers is greater than 10 and one of the numbers is 4.

The perimeter of a square is 40 cm. What is the length of one side of the square?

• 5 cm

• 15 cm

• 20 cm

• 10 cm

Answer explanation

The perimeter of a square is calculated by multiplying the length of one side by 4. Since the perimeter is 40 cm, each side of the square is 10 cm long. Therefore, the correct choice is 10 cm.

Tags

CCSS.4.MD.A.3

If you invest $500 at an interest rate of 3% per year, how much money will you have after 5 years?

• $515.00

• $550.00

• $600.00

• $579.14

Answer explanation

If you invest $500 at an interest rate of 3% per year for 5 years, you will have $579.14. This is the correct choice.

Tags

CCSS.HSF.BF.A.2

If you invest $2000 at an interest rate of 4% per year, how much money will you have after 2 years?

• $2080

• $2100

• $2200

• $2160

Answer explanation

If you invest $2000 at an interest rate of 4% per year, after 2 years, you will have $2160. This is the correct choice.

Tags

CCSS.7.RP.A.3

A car travels at a speed of 80 miles per hour. How far will it travel in 3 hours?

• 240 miles

• 180 miles

• 260 miles

• 300 miles

Answer explanation

The car travels at a speed of 80 miles per hour for 3 hours, so it will travel a total distance of 240 miles. Therefore, the correct choice is 240 miles.

Tags

CCSS.6.RP.A.3B

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign

• Expressions do not have an equal sign and equations do have an equal sign

• There is not a difference

• Expressions do not have variables and equations have variables

Answer explanation

Expressions have an equal sign and equations do not have an equal sign. This highlights the correct choice.